A satellite telephone, satellite mobile phone, or satphone is a mobile phone that communicates directly with orbiting communications satellites. It depends on the building of a specific system, reception normally include the rest of the Earth, or just specific parts.
The mobile device, well-known as a terminal or perhaps earth station, ranges widely. A satellite phone handset has a range and weight identical to that of a late 1980s or early 1990s phone, but usually having a large retractable antenna. These are well-known on escapades into distant regions where terrestrial cell phone service is beyond reach.
A fixed installation, like used shipboard, may include large, durable, rack-mounted electronics, and also a steerable microwave antenna on the mast that immediately tracks the overhead satellites. Sat handsets have notoriously poor coverage indoors, however it can be possible to get a consistent coverage near a window or within the top floor of a construction if the roof is adequately thin. The mobiles have connectors for external antennae that are typically set up in vehicles and residences.
Some satellite phones use satellites in geosynchronous orbit. These systems could maintain near-continuous global coverage having only 3 or 4 satellites, lessening the starting charges.
The negative aspect of geostationary satellite systems is that many areas even where a large amount of open sky is present the line of sight among the mobile and the satellite is destroyed by obstructions for instance steep mountain hills and forest and the user should find higher ground before having the capacity to use the mobile phone. This is not the example with Low Earth Orbit (LEO) services - despite that the network is clogged by an obstacle you can wait a few minutes until another satellite passes overhead.
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Satellite phones have made communication easier in places which do not have mobile phone network coverage. The satellite phones use a network of LEO satellites that are constantly hovering above the Earth's surface.
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